I have to agree with a few people here who are noting closed-mindedness of posts.
I'm not a religious person, but I do believe that a great deal of the bible has basis in fact--because a lot of it was a history of a people, and when people don't understand the science behind things, they turn to mystical reasons. Around the time the GoE was to have existed, there was an ice age, and due to weather coming down from the not-so-far-away frozen north, the area that is now desert was likely lush and bountiful, with plenty of water, plants and animals. Then, the ice age ended, the region dried up, and I bet that a group of people felt like someone must have done something to offend God, to make him take away their beautiful 'garden'.
Seriously, people...just because people you don't agree with believe in something doesn't mean that they are just talking out their butts.